Evaluation of Local Anisotropy of Magnetic Response From Non-Oriented Electrical Steel by Magnetic Barkhausen Noise

Non-oriented electrical steels are indispensable materials for use in electric motors as magnetic cores. It is desired that the magnetic properties of the steel sheets be optimal and uniform in all the directions in the sheet plane. Thus, knowing the magnetic properties of the steel sheets in all th...

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Bibliographic Details
Published in:IEEE transactions on magnetics 2018-11, Vol.54 (11), p.1-5
Main Authors: He, Youliang, Mehdi, Mehdi, Hilinski, Erik J., Edrisy, Afsaneh, Mukundan, Shruthi, Mollaeian, Aida, Kar, Narayan C.
Format: Article
Language:English
Subjects:
Anisotropic magnetoresistance
Anisotropy
Annealing
Barkhausen effect
Crystallography
Electric motors
electrical steel
Electrical steels
magnetic Barkhausen noise (MBN)
Magnetic cores
Magnetic properties
Magnetism
Magnetomechanical effects
Metal sheets
Perpendicular magnetic anisotropy
Residual stress
Steel
Steel industry
Texture
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Summary:Non-oriented electrical steels are indispensable materials for use in electric motors as magnetic cores. It is desired that the magnetic properties of the steel sheets be optimal and uniform in all the directions in the sheet plane. Thus, knowing the magnetic properties of the steel sheets in all the directions is crucial for the design of the motors. However, the magnetic properties of non-oriented electrical steels are usually measured by the standard Epstein frame method, which normally only gives the overall magnetic properties in the rolling and transverse directions and those in other directions are usually unknown. In this paper, magnetic Barkhausen noise (MBN) analysis is utilized to characterize the local magnetic response of non-oriented electrical steel. By aligning the MBN sensor to all the directions in the sheet plane, angular magnetic response is obtained. The measured MBN is then directly compared to the texture factor evaluated in the same direction. In this way, the local magnetic response of the steel is correlated with the crystallographic texture. It was found that MBN technique was able to detect the difference in magnetic response induced by magnetocrystalline anisotropy if the effect of the residual stress can be eliminated. This would provide a potential technique for the characterization of magnetic properties of non-oriented electrical steel.
ISSN:0018-9464
1941-0069
DOI:10.1109/TMAG.2018.2844738